Hey @Sarphu Rongpi , thank you for reaching out.
The application that you are testing Call with Chat Composite is not Teams interop and it is not designed to be used with exchanged Teams tokens.
Can you please try to run our sample application get-started-with-voice-video-calling-custom-teams-client locally?
That said, you can try the below to get the user ID but I'm not sure if it will work or not:
- Copy the ACS access token you have
- Decode the JWT access token with any JWT decoder. For example JWT.MS
skypeIDand use it as user ID.
Again, this might not work as the sample is not built to be used with exchanged tokens and your best shot will be to run the sample mentioned above locally.